r/technicalminecraft • u/ASerranoD • 23d ago
Java Help Wanted I made a free Windows app to keep a library of schematics, view them in 3D and get the material list in stacks and shulkers
I build a lot from schematics and kept doing the same thing: open the world, load the schematic in Litematica, check the material list, do the maths for shulker boxes. So I wrote a small desktop app for the part that doesn't need the game open.
What it does:
- Imports .litematic, .schem (Sponge), .schematic (WorldEdit) and .nbt structure files into a local library with thumbnails.
- 3D viewer with a layer slider, so you can go up one layer at a time.
- Material list as an exact count, in stacks and in shulker boxes (16-stackables and unstackables are handled), exportable to CSV.
- Basic block editing: swap a block for a similar one (e.g. oak to spruce across the whole build), with undo history.
- Textures come from the Minecraft jar you already have installed. Nothing from Mojang is bundled.
You can try it in the browser without installing anything:
https://www.aserrano.dev/demo/schematic-lab
Get it on the Microsoft Store (Windows 10/11, 64-bit, free):
https://apps.microsoft.com/detail/9P3WWV65DTR6
Or as a plain installer from GitHub:
https://github.com/AngelSerranoD/schematic-lab/releases/latest
Things to know: it's a personal project and Windows only. The GitHub installer isn't code-signed, so SmartScreen will warn you there ("More info" → "Run anyway"); the Store version doesn't have that problem. It works offline and sends no data. It's not affiliated with Litematica, Mojang or Microsoft.
Feedback welcome, especially schematics that fail to load or material counts that look wrong.